Birkenstock Women' S Blue thong Sandals Sz. EU 40 in pre-owned condition. Significant discount due to the level of wear. Comfortable, Ideal for everyday wear. Sole material Ethylene Vinyl Acetate Outer material Rubber Inner material Unlined Closure type Buckle About this item Type: Thongs Material: EVA Color: blue More Information: EVA Description Introducing the Derry - a colorful boot ready for the day's adventure, no matter the weather. Keep feet dry and comfortable, even in the biggest puddles. The upper is made from extremely light and flexible EVA.